Back to School, Back to Cool with Carney & Son AC in Charleston

Have you and your family been feeling beat by the summer daze and heat in Charleston and Johns Island? Now that it is back to school time again, we can all start looking forward to some slightly cooler days. To make certain your home is ready for the “winter” in Charleston, you should consider how to get your own home “back to cool” before another heat wave rolls over the region.

At Carney & Son 72 Degrees, our Johns Island AC technicians are here to help you get your household fully prepared for the fall, cool, and comfortable again. Is your current air conditioner as old as your house? Does it take a while for the temperature to drop even one degree after you switch your AC on? Maybe your home’s equipment is still using outdated R-22 Freon? If you answered yes to any of these questions, we have a service that can help!

Ask our team about how the following services can you back to cool:

  • AC installation: In order to get “back to cool” as your kids go back to school, you might need to install an entirely new system into your home. Our Johns Island AC techs have the tools and experience needed to complete the job as soon as possible.
  • AC replacement: Old AC systems might just not be enough to keep up with the lingering summer heat. Consider replacing specific parts of the system for key upgrades, or swapping out an entire system with our help.
  • AC repair and maintenance: We often recommend starting your AC service work with maintenance and inspection. It is possible that our Charleston HVAC specialists can make a few repairs to get your system up and running again. If it is working efficiently, let us perform routinely scheduled maintenance to ensure your AC stays A+.
  • Ductless mini split projects: Many homeowners in Charleston and Johns Island are switching to alternative ductless mini split units for heating and cooling needs. We would be happy to explain to you how this can help you go “back to cool” while also making your AC system more energy-efficient.

No matter what needs to be done to push away the summer heat, you can confidently lean on our Charleston air conditioner technicians for competent, friendly, and efficient service. Carney & Son 72 Degrees is a third-generation, family-owned business known for getting the job done right the first time and offered at competitive prices. Check out our coupon catalogue to see if any apply to your AC, heating, or HVAC project. You can also contact us directly to speak with a member of our team about fantastic service deals at the tail-end of summer.

Why Choose a Variable Speed Air Conditioner?

As a homeowner, you can upgrade many different parts of your home. Want your water bill to drop? Install low-flow plumbing fixtures! Want to save money on your electricity? Switch to LED lightbulbs. Your heating and air conditioning systems are just like anything else: there are many different upgrades available, and many of them contribute to increasing the efficiency and effectiveness of your home comfort system. One these upgrades is choosing a variable speed air handler instead of a typical single speed model. On this blog we’ll explore some of the major differences between single and variable-speed air handlers and show you just a few of the benefits of making the switch to a variable-speed unit.

How Does a Variable Speed Air Handler Work?

Single speed air handlers, like the name implies, have one speed: full-blast. They turn on and off regularly delivering their full force of cool air in order to bring your home to temperature. As you can imagine, since they are constantly functioning at their full capacity, these systems use a lot of electricity and can really spike your energy bills. These systems are also fairly loud: if you currently have a single speed air handler, you probably notice it turning on and off, but maybe not so much in between.

In contrast, a variable speed unit operates at lower speeds for longer periods of time. These systems can ramp up to full capacity when necessary, but the majority of the time will make subtle adjustments using a limited power level. As a result, these systems are generally much quieter—in fact many variable speed system owners say they can’t even hear their system turn on or off, but they can feel the comfort level in their home.

Advantages of a Variable-Speed System

Here are a few reasons why you should consider making the switch from a single-speed air handler to a variable-speed system:

  • Air Distribution: Variable-speed systems are generally more effective at allowing air to reach parts of your home that might otherwise not receive as much air, especially rooms which are farther away from the main blower unit. This means a more even temperature in your home.
  • Energy Efficiency: Because these smaller adjustments won’t require your system to turn on to its full capacity, you’ll actually wind up using far less electricity, which will help you save a bundle on your monthly energy bills.
  • Better Circulation: Have you ever noticed the air in your home begins to smell stale and odorous? Longer operation times at lower speeds means your indoor air will be more continuously circulated meaning you’ll have far more fresh air than a single-sped system.
  • Hypo-Allergenic: Along with fresher air, a continuously circulating system also pulls more air out of your home and runs it through your air filter. This extracts more dust, pollen, and other allergens from the air, providing you with much-needed allergy and asthma relief.
  • Humidity control: Your air conditioner is essentially a huge dehumidifier… when it’s running. Operating longer at a lower speeds means your system will continue to draw moisture out of your indoor air. If you’re suffering from high humidity levels in your home, you may want to consider making the switch and installing a Honeywell 8000 thermostat with humidity control!
  • Noise Level: Again, with longer operation cycles at lower speeds, variable speed air handlers turn on and off less often. Since powering on and powering off is when your air handler is its loudest, you’ll experience les noise from your air conditioner in general.

If you are in need of HVAC system replacement, we recommend that you at least consider upgrading your single speed air handler option to a variable speed option. The planet, your electric bills, and your wallet will all thank you when your energy consumption drops dramatically within days of the system first being installed.

If you are located on Johns Island, James Island, West Ashley, Downtown, Daniel Island, Mount Pleasant, North Charleston, or surrounding areas, and are interested in having one of our background checked, drug tested, professionally trained technicians out to your home, call Carney & Son 72 Degrees today! We are a family-owned and operated business that has helped thousands of residents get the repairs or installation services they need over our more than 30 years in business. We firmly believe your satisfaction is of the utmost importance, and we work tirelessly to get the job done right the first time in order to build a lasting relationship with our customers.

Find out more about upgrading to a new variable-speed air handler! Call Carney & Son 72 Degrees today by dialing 843.242.7065.

The Importance of Changing Your Air Filter

Minor maintenance tasks are so small that people tend to overlook them as unnecessary at times. However, when these minor tasks are forgotten or put off for too long, they can easily turn into major problems. Your air conditioning and heating system is one of many things that requires periodic maintenance to run properly, primarily due to some of the hazards and struggles it has to work around in order to do its job. One of these factors is the dust, dirt, and dander present in your home, all of which could eventually build up on your air conditioner’s condensation coil, resulting in reduced effectiveness, increased energy consumption, or worse—a full system freeze.

Fortunately your HVAC system has a solution to prevent this from happening: an air filter. This small yet immensely important part of your heater and air conditioner is designed to remove dust, dander, pollen, pet hair, mold spores, and other airborne pathogens before they can get in and damage your air conditioning unit. These filters are generally extremely easy to replace, taking just a few minutes, and new filters generally cost just a few dollars at your local home improvement store. Let’s take a closer look at why and how often you need to change your air filter.

Consequences of a Clogged Filter

Your central heating and cooling system is designed to take in a certain amount of air through the return vent(s), condition it by blowing the air over the evaporator coil, and then circulate it back into your house. As air is pulled through the return vent, it passes through your air filter, leaving behind the airborne allergens and other materials. However, over time the filter will begin to fill up with particulates, resulted in restricted air flow.

Restricted air flow puts a lot of additional strain on your HVAC system. When the filter is clogged, the blower fan motor has to work harder to pull air through the filter to be conditioned, which drives up your utility bills, and could lead to the fan motor burning up or other system malfunctions.

If your filter is dirty, some of these dust particles will get through the filter, making everything beyond it dirty as well. Dirty evaporator coils allow water to condense and chill, eventually freezing into ice, and a buildup of ice accumulation eventually leads to the coil freezing up entirely. A frozen coil blocks air flow, which dramatically increases the chances of a total system failure. Excess dirt, dust, and dander also end up in your home’s ductwork, compromising the quality of your indoor air.

When Should I Change my Filter?

Despite the ease of replacement and low cost of a new HVAC filter, many people simply forget that they need to change theirs out. This is mostly due to the fact that most people don’t know they should be changing their filter far more frequently than they do. How often you have to change your air filter will vary greatly depending on the amount and type of airborne particulates that your filter must remove. Some homes have more while others have less, but regardless, changing your HVAC air filter regularly is imperative to the proper function of your home comfort system.

For the average home, it’s strongly suggested that you change your filter at the very minimum at least once per year, usually in early spring so you have a brand new filter which can catch as much of the pollen, dander, and other material floating in the air around this time. However, if you have a pet, a larger home, or run your system a lot, you should change your filter twice a year, once in the spring and again in the fall. You should inspect your filter periodically as well to make sure it’s still in good working order and you can change it as soon as necessary.

What Kind of Filter Should I Buy?

With so many options to choose from, selecting an appropriate filter for your home may seem like a daunting task. Filters are rated based on percentage of airborne particles they remove from your indoor air, and they are grated on a scale known as the MERV rating. The higher the MERV rating, the better the filter, and the more airborne particles removed.

We recommend buying a filter with at least a MERV 8 rating (they ensure good air flow while offering some HVAC system protection. However, if you’re super serious about the quality of your indoor air you may be interested in selecting a MicroPower Guard® electronic filter. MicroPower Guard® filters use electronically charged carbon to capture an incredible 97% of airborne particles. These are perfect for families in which one or more people deal with severe allergies or asthma.

At Carney & Son 72 Degrees, we can help you install one of these electronically charged MicroPower Guard® filters! Call our office today at , or submit a form submission through our website for more information on having a year supply of filters drop-shipped to your door.

Need Your Ductwork Cleaned? We Can Help!

If your central air conditioning and heating system is like the heart of your home, then the ducts that connect it to each of the various rooms might as well be the veins and arteries. You depend on the ducts in your home to effectively transport the conditioned air throughout your home to keep you comfortable, whether it’s in the heat of summer of the dead of winter. However, like the rest of your system dust and other deposits can collect in your ducts, causing it to continuously swirl throughout your home, aggravating allergies, triggering asthma, and much more.

When this is the case, you should have a professional Charleston HVAC services team come out to your home and clean your ducts! This is a fairly simple service, requiring just a few hours, but the benefits can be numerous. Let’s look closer at this procedure, including how it works, what equipment we use, and why you should schedule a duct cleaning service today!

How Are Ducts Cleaned?

There are two ways to clean ductwork; forced air and suction; Carney & Son 72 Degrees uses the latter. We service your duct system using the best duct cleaning machine on the market: the BRUSH BEAST™ by RotoBrush International.

The BRUSH BEAST™ is essentially a huge vacuum cleaner with an agitator attached to the end of the hose that spins while simultaneously sucking in the dirt, dust, and debris that it knocks loose. Your service technician feeds the tube into your vent, then turns the machine on. The agitator brush spins rapidly to dislodge all of the buildup in your duct system, even buildup that has become stuck or accumulated due to moisture. (We have different-sized agitators that our technicians can swap in and out allowing us to clean all sizes of ductwork and dryer vents.)

The dislodged dust and dirt is then sucked into the vacuum, where it’s deposited into an industrial-strength filter bag, where it can easily be disposed of after the job has been completed. And just to make sure none of that nasty dust and residue gets released into your home, the unit comes equipped with a large HEPA filter to make sure all exhaust air that enters your home is clean and safe to breathe.

Check out this video to see a demonstration of the BRUSH BEAST™ in action!

Our process is extremely thorough. Depending on how many vents you have, it takes anywhere between 4-6 hours to clean all supply vents, supply trunkline(s), and return(s).

Why Clean Your Ducts?

While each home is different, no home is immune from factors that lower air quality, including dust, allergens, pet hair, smoke (from cigar or cigarette smokers), or even water contaminants. While nearly everybody will suffer from bad air, those with severe allergies, asthma, or other respiratory issues could face serious hardship if the air quality in their home is poor. Dust and other debris in your ducts will continually be recirculated throughout your home, meaning this problem won’t go away by simply changing your air filter.

Your HVAC system itself will also benefit from a duct cleaning. Dirty ducts send dust and other particles to your condenser coil, where they can get stuck to the coil itself. Over time, moisture condenses onto this dust, which then freezes under repeated or continual use. One drop of frost then slowly builds up until your entire coil is frozen over, along with your blower motor, resulting in major damage or total failure of your air conditioner (yes, even in the hottest days of summer).

Keep It Clean

Once your ductwork system is clean, you will probably want to keep it that way. To keep it in pristine condition we suggest having an AirOasis: Bi-Polar® Plasma Air Cleaner installed at the completion of cleaning. This little device mounts inside of your HVAC equipment and uses positively and negatively charged ions to neutralize odors and improve air quality. It also attacks & breaks down DNA, which eliminates mold, bacteria, & viruses. This system also attaches positive and negative ions to airborne particles, weighing them down and ultimately making them drop out of the air.

If you’re located in Charleston or surrounding areas and need your duct system cleaned, call a professional HVAC technician, not a carpet cleaning specialist who isn’t familiar with how HVAC systems work. Instead, schedule an appointment with Carney & Son 72 Degrees! While our technician is onsite, be sure to ask about some of the indoor air quality products we offer! All our technicians are licensed, drug tested, and professionally trained to ensure you receive the top-quality service you have come to expect from our family-owned and operated business!

How can Carney & Son 72 Degrees help you today? Call us at to schedule an appointment or receive a service estimate!

The Importance of HVAC Maintenance

Carney & Son is Heating and Air Charleston SC Can Count On!

In many aspects, your home’s central heating and air system is comparable to a car. Much like a car, your HVAC system needs regular maintenance to operate at peak performance and efficiency. Carney & Son is Heating and Air Charleston SC can count on!

Not maintaining your Heating and Air System

HVAC performance will begin to suffer fairly quickly, and you’ll experience a major breakdown far quicker. Your system will finally wear out for good much faster.

Therefore, it’s important to have your system maintained regularly in order to make sure it is:

  • Running at its absolute best
  • Free from any defects or issues that may be about to cause a major breakdown.

Even if you’ve just had a brand-new HVAC system installed, maintenance services are still necessary. Manufacturers require you to have your system serviced at least once a year to keep all parts warranties valid.

heating and air charleston sc carney and son

Regular Maintenance Extends the Life of Your System for Heating and Air Charleston SC

Unlike your car, it is probably safe to say that many of you have never disassembled or looked in great depth at our home’s HVAC system. If you have, there is a strong chance you didn’t know too much about what you were looking at. While this isn’t abnormal, if you don’t have a professional look at it every now and again, you may not know problems exist.

This is where regular preventative maintenance can be extremely valuable. Having a highly-trained and certified technician maintain your system will allow them to inspect some of its most critical components. This will ensure that they are in good working order and free from any potential signs of trouble. This is particularly important for your coils, blower motor, fans, belts, and more.

A maintenance service includes checking parts, cleaning, tightening, and lubrication of moving parts. This will ensure they’re in peak working condition and your system is ready for the long haul. Even though you’ll be putting many hours of use into your HVAC system, you can have the confidence it will be up to the task and sustain as little wear and tear as possible. In the long term, a high-quality maintenance service can extend the life of your system. Adding several years to its life will save you thousands of dollars on a replacement system.

Detecting Coolant Leaks in Your Heating and Air System

Regular maintenance, to a certain extent, can also help protect the environment. Air conditioning refrigerants are chlorofluorocarbons (CFCs), which contribute to ozone depletion. Not only can early detection of a leak stop these CFCs from escaping into the atmosphere, where they can do serious harm to the planet, but you won’t have to replace the expensive Freon that escaped. The government started phasing out R-22 Freon back in 2010. They would like to see it completely out of use by 2020. As the phase-out process continues, simple supply and demand states it will only get more expensive to charge your unit as this deadline draws near. Most importantly, leaking refrigerant is also one of the leading causes of system failure; leaks often leading to Freon lines freezing up and icing over, potentially causing other damage including total system failure.

Let Our Team Maintain Your Heating and Air System! We cover Charleston, SC and the entire Tri-County area.

If you’re located on Johns Island, James Island, Downtown, West Ashley, Summerville, Wadmalaw, or surrounding areas call our office today to learn more about what it means to be a part of Carney & Son 72 Degrees Preferred Comfort Club. Club members receive two seasonal system evaluations (Fall & Spring) to check to make sure that your system is operating properly.

Your spring tune up includes a condensing coil cleaning to make sure your SC is ready to go for the summer months!

Club members for Heating and Air Charleston SC will also receive a discount on all service fees:

20% on all repairs listed on our straight forward pricing guide. 5% discount on a full system replacement should you have to install a new unit. Being a Preferred Comfort Club member will give you priority scheduling, keep your manufacturer parts warranties valid, promote safety, improve unit efficiency, get you various discounts, and more.

We would love for you to join our Carney & Son 72 Degrees family, contact us today by dialing 843.242.7065 and let us bring your system up to par with a high-quality preventative maintenance service! Carney & Son is heating and air Charleston SC can count on!

HVAC Dictionary

The Ins and Outs of HVAC Charleston SC

We strive to provide informative, professional services to our clients. In an effort to further educate our customers, we have compiled a list of common HVAC parts and other related terms. Here’s what you need to know regarding typical HVAC Charleston SC.

2 Main Types of HVAC Systems:

  1. Split System – simply put, a split system has a piece that sits outside (the condenser) and a piece that sits inside (the air handler/furnace). They are connected to each other by freon lines. There are a few different types of split systems:
    1. Gas Split System – composed of a straight air condenser with a gas furnace and coil
    2. Electric Split System – composed of a straight air condenser with an air handler (with
      or without heat strips)
    3. Split Heat Pump System – often comes with or without heat strips
    4. Mini Split Systems – popular brands for this system include Mitsubishi & Samsung
  2. Package System – with this system, one piece of equipment sits outside. Typically, package units are seen on ranch-style homes or on first floors of multi-story homes. Ductwork branches off of it and shoots into the crawlspace. There are 2 different types of package units: gas package systems or package heat pumps. Freon lines and other components are contained within.

Other Types of HVAC Equipment:

  1. Air Handler – part of your indoor heating and cooling system. Depending on your home’s needs, it can circulate both hot and cold air. An air handler helps maximize the overall efficiency of the HVAC unit.
  2. Condenser – part of the outdoor system of a split air conditioning unit. It sits outside your home and comes in several different sizes. A highly functional, properly maintained condenser can increase the efficiency of your HVAC unit and decrease energy consumption, lowering your energy bills.
  3. Capacitor – small cylinder that holds energy. It provides electric jolts to start the HVAC motor, and has enough power to keep the motor running. There are 3 main types of capacitors:
    1. Start capacitor – provides the power to start the HVAC motor. It contains a high voltage to kick-start the motor, and creates an electric current for each of the individual start windings of the motor. Without the start capacitor, the motor would just hum.
    2. Run capacitor – provides the boost to maintain the electrical current that powers the motor. It must be the proper value rating to avoid overheating the motor.
    3. Dual capacitor – provides the electrical current to keep the A/C unit running. It
      has 2 components: 1 capacitor maintains power in the fan motor, and the other capacitor maintains power in the compressor.
  4. Contractor – a professional HVAC company or individual who can inspect, repair, and install quality HVAC equipment in your home. Contractors should be licensed with the Contractors State License Board, and should be insured. Many quality contractors offer honest, written estimates before each project, and provide friendly, informative services from start to finish.
  5. Condensate Drain – a dripping line on the outside of the air conditioning unit. It removes condensation from the air conditioner’s evaporator coil. If the condensate drain becomes clogged, mold and algae can grow, causing water damage and high humidity in your home.
  6. Evaporator Coil/Evaporator Core – a heat exchanger that circulates warm air over cold liquid refrigerant. The air becomes chilled and turns into a cold gas, and the refrigerant transports it to the outside compressor. The vapor is then compressed and sent through the condenser’s coil to provide cold air in your home. Thus, it facilitates the process of turning warm air into cold air, which is essential to keep your home comfortable on hot summer days.
  7. Filter – cleans the air in your system by blocking particles, allergens, dust, smog, mold, smoke, and other harmful materials. Electrostatic air filters generate their own power and require no hookup. On the other hand, carbon air filters are disposable, require no refilling, and can protect your home from fumes and odors.
  8. Freon – an aerosol propellant, organic solvent, and refrigerant. It consists of a group of chlorofluorocarbons and other compounds. As the main cooling mechanism in many air conditioning systems, this nonflammable gas keeps the temperature low to provide cold air to your home.
  9. Inverter – an electrical inverter that regulates the speed of the compressor motor. It converts AC (alternating currents) to DC (direct currents), and then uses modulation in an electrical inverter to adjust the frequency of the motor. This advanced technological device can improve the efficiency of your HVAC system by allowing you to adjust the speed of the motor. It also makes the A/C unit quieter, and provides the benefits of less break downs and lower operating costs.
  10. Minisplit – heating and cooling system that lets you control the temperature of individual rooms in your home. It is comprised of an indoor unit, called an evaporator, and an outdoor unit, called a condenser. These systems are small, easy to install, and provide the benefit of increased temperature control over the spaces in your home. They are also great to use with ductless heating systems.
  11. Transformer – regulates the power supply to HVAC systems. It transforms higher voltage into lower voltage to increase the safety and functionality of the heating and cooling system. It also helps protect against power surges, works with both AC and DC control, and regulates the general voltage of your system.
  12. TXV – stands for a Thermostatic Expansion Valve. This metering device acts as a regulator to control the rate of refrigerant flow into the evaporator. Thus, it increases the efficiency of the evaporator and avoids floodback (where excessive liquid refrigerant flows back into the compressor).
  13. X-13 Motor – this product is a Constant Torque motor that has been used in the residential HVAC industry since 2006. It is programmable, and provides a consistent level of torque, or power, to each system’s demands (including a continuous fan, heating, and cooling). It increases the efficiency of HVAC systems and provides a more precise, consistent airflow.

best in hvac charleston sc

Common HVAC Acronyms:

  1. IAQ – an acronym for Indoor Air Quality. Poor IAQ can lead to asthma and other respiratory problems. The United States Environmental Protection Agency cites poor IAQ as a leading environmental danger to public health, and it is important to ensure your HVAC system is properly functioning to avoid polluted indoor air.
  2. MERV Rating – an acronym for Minimum Efficiency Reporting Value. It rates the overall effectiveness of the air filters in an HVAC system. A higher MERV rating means a finer filtration system, therefore, this results in cleaner air and fewer harmful particles that pass through the filter.
  3. SEER – an acronym for Seasonal Energy Efficiency Ratio. It measures the efficiency of air conditioning and heat pump cooling systems. A higher SEER rating equals higher efficiency.

For the Leaders in HVAC Charleston SC, Call Our Expert Technicians Today

At Carney & Son 72 Degrees, we provide quality HVAC systems for your home. Our professional technicians can inspect your system for damage, repair any problems, and install state-of-the-art equipment to meet your needs. We strive to provide the best in HVAC Charleston SC. Our team can use more than 30 years of combined experience to diagnose and fix a variety of HVAC system issues, so call today.

Contact us today to schedule an appointment. We are available 24/7 for your convenience.

Freon: R-22 versus R-410A

You may need AC Repair in Summerville SC if you have leaking freon. Learn the difference between R-22 and R-410A from experts, Carney & Son 72 Degrees, for all your HVAC needs.

If your home is feeling hot, you may need AC Repair in Summerville SC.

Freon is the refrigerant used in HVAC systems for cooling. The most common type used for the past four decades is called R-22. Leaking R-22 contributes to ozone depletion and when it is made it contributes to global warming.

For this reason, there is an international environment agreement (called the Montreal Protocol) to phase out R-22. By January 2020, the US must reduce its use by 99.5% below the US baseline. Recycled or recovered refrigerant will be allowed to service existing R-22 units but it is advised that ozone safe refrigerant and equipment be installed.

The safer refrigerant that is taking the place of R-22 is called R410-A.

It is a non-ozone depleting blend of hydroflurocarbons but it does still contribute to global warming. HVAC equipment has had a mandatory revamp for the new R-410A.

The good news is when you update to a revamped unit, they are high-efficiency units that will not only protect the environment but save you money as well! High-efficiency units are higher seer units (for more information please see our blog on SEER rating).

Other benefits of R-410A are that it is non-flammable, less toxic, less expensive (R-22 cost is steadily rising), operates on high pressure, better at transferring heat, is Non-flammable, and it works with copper, steel and brass.

One of the biggest signs of a Freon leak is decreased cooling of your HVAC system.


If you notice that your unit isn’t cooling as well as it usually does, you should have it serviced. If you notice ice buildup on your evaporator coil, this could be from insufficient amounts of Freon due. The most common causes of a Freon leak in central HVAC units is:

  • Condenser unit vibration
  • Physical damage
  • Corrosion of the steel components.

If you think you may have a Freon leak and need an AC repair in Summerville SC or would like a quote on switching to R-410A compatible equipment, please give us a call at 843-242-7065.

Check our online reviews and call us with confidence for your AC RepaiR SummervillE SC!